feat: add GameGroup2 project with frontend and backend

- Add .gitignore for Node.js and PocketBase projects
- Add frontend (Vue 3 + Vite + TypeScript)
- Add backend (PocketBase)
- Add deployment scripts and Docker compose configs

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/Dockerfile

@@ -0,0 +1,30 @@
+# 构建阶段
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# 复制 package 文件
+COPY package*.json ./
+RUN npm ci
+
+# 复制源码
+COPY . .
+
+# 设置构建参数并构建（默认使用相对路径，由 nginx 代理）
+ARG VITE_PB_URL=/api
+ENV VITE_PB_URL=$VITE_PB_URL
+
+RUN npm run build
+
+# 生产阶段
+FROM nginx:alpine
+
+# 复制构建产物
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# 复制 nginx 配置
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]